....*** ِAuto mechanics .***....

Continued:: How can increase the capacity of the engine:::




2 - (a) increase the efficiency of combustion (thermal efficiency): - Increasing the compression ratio compression ratio Compression ratio = volume of space above the piston at the point at the bottom ÷ dead space volume above the piston at the upper dead point Increase the compression ratio to increase the efficiency of fuel consumption and capacity.



Compression ratio for gasoline engines within the limits of 8 to 1:9, and diesel within 17 to 1:19.



- Use of electronic fuel injection Electronic fuel injection (EFI) - Use of e-Ignition Electronic ignition - Modified the engine design and engine design and modifications, to increase the excitement inside the engine, and increase the degree of mixing, and this is done through the design of the combustion chamber and manifold.



2 - (b) take advantage of some of the energy lost with the exhaust gases: - Use the Atkinson cycle instead of the Otto cycle, where the ratio of expansion is greater than the compression ratio of the engine.



3 - increase the length of the annex to the column of the annex:


- This depends on the design of crankshaft, the more the greater the length of the annex stresses on the column.